Re: Where is SDVO mode setting code in kernel module sources?

[Adam Jackson <ajax@redhat.com>]

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On Wed, 2011-10-19 at 18:43 +0400, 4ernov wrote:

> And is it guessed somewhere in case of VBT missing?

Well, not yet, no.  Like I said, there's no code at all yet for tweaking
SDVO LVDS.

> In my case there's
> no OpRegion support (i945GME chipset don't support it as mainboard
> manufacturer informed)

This is, at best, stretching the truth.

> thus there're only "*ERROR* VBT signature
> missing" and "failed to find VBIOS tables" messages printed and I
> think the module doesn't use VBT after this.

I suppose in this case you'd have to hope that the SDVO init code at
POST time set up the device correctly, so that if you called
SDVO_CMD_GET_LVDS_PANEL_INFORMATION it'd tell you the truth.  But that
assumes that the SDVO init code does that, and it might not, I don't
actually know; Intel doesn't release the docs for that publicly (or even
under NDA unless you're an OEM).

That or we'd need to add a way of passing in a VBT from the kernel
command line, like ACPI DSDT override does.

- ajax

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